Diarrhea ICD-10-CM Codes

What ICD-10 codes are used for diarrhea? 

Here's a list of the three most common ICD codes used for diarrhea that you can use for medical billing and coding:

• R19.7 - Diarrhea, unspecified: This code can be used if the patient is confirmed to have diarrhea, but the specific type is unknown.
• K59.1 - Functional diarrhea: This code can be used if the patient is confirmed to have functional diarrhea, meaning that 75% or more of their stools are loose or watery, and there is no associated pain.
• K58.0 - Irritable bowel syndrome with diarrhea: This code can be used when a patient has irritable bowel syndrome with diarrhea.
• P78.3 - Noninfective neonatal diarrhea: This can be used if a neonate (newborn) has noninfective diarrhea.
• A07.9 - Protozoal intestinal disease, unspecified: This can be used if a patient has protozoal diarrhea due to a protozoal intestinal disease.

Another code is F45.8 - Other somatoform disorders can be used when the patient has psychogenic diarrhea. 

Which diarrhea ICD codes are billable? 

All of the previously mentioned ICD-10 codes are billable. 

Clinical information

• Frequent bowel movements with loose and watery stools characterize diarrhea. There are two types: acute and chronic. Acute diarrhea typically lasts 1 to 2 days, while chronic diarrhea persists for longer, exceeding 3 to 4 weeks.
• The causes of diarrhea vary depending on its type. Acute diarrhea can be triggered by viral, bacterial, or parasitic infections, food intolerances, intestinal diseases, medications (as a side effect), or surgery. On the other hand, chronic diarrhea may be attributed to conditions like inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS).
• In addition to watery stools and increased bowel movements, patients may experience nausea, bloating, abdominal pain, cramping, and dehydration as common symptoms.
• Dehydration is a high-risk concern for patients with diarrhea. Diagnosing the condition involves a physical examination and urine, blood, and stool tests. Imaging tests, colonoscopy, and sigmoidoscopy may also be performed.
• The treatment approach focuses on resolving dehydration and addressing the underlying cause through medications and other appropriate therapies.

Synonyms include

• Functional diarrhea
• Acute diarrhea
• Secretory diarrhea
• Inflammatory diarrhea
• Hemorrhagic diarrhea
• Irritable digestive system
• Diarrhea due to infectious gastroenteritis
• Abnormal clinical findings showing diarrhea
• Noninfective gastroenteritis accompanied diarrhea
• Unspecified diarrhea
• Bowel habit disrupted due to diarrhea

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